Breast Cancer Symptom FAQs: Lump Under Arm, Not in Breast

Patient Expert

Q. I felt a lump under my arm, in the area of my armpit, not in my breast. So that means I don't have to worry about breast cancer, right?

A. Wrong. Your breasts don't begin and end right there front and center on your chest; breast tissue can actually stretch up under the arm. In addition, there are a number of lymph nodes in your armpits that, when swollen, are a sign your body is fighting an infection... or cancer.

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